A train covers a certain distance at a uniform speed. If the train had been 8 km per hour faster, it would have taken 3 hours less than the scheduled time and if the train was slower by 8 km per hour it would have taken 5 hour more than the schedule time. Find length of the journey.
A cyclist covers his outward journey at 15 mph.
The return, over exactly the same distance, is uphill. He completes it at 5 mph.
What is the cyclist's average speed over the entire journey?
